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Eruption of Anatahan
This page contains archived content and is no longer being updated. At the time of publication, it represented the best available science. However, more recent observations and studies may have rendered some content obsolete.
The Anatahan Volcano in the Mariana Islands erupted again in early July 2005, spewing ash to an elevation of 12,000 meters (40,000 feet). Earthquakes and small explosions followed the eruption, and the volcano has continued emitting ash and steam.
On July 11, 2005, the Moderate Resolution Imaging Spectroradiometer (MODIS) flying onboard the Terra satellite captured this image. Ash and steam drift westward from the volcano’s summit, and vog appears at the far left of the image. Vog forms when volcanic pollutants mix with oxygen and water in the presence of sunlight.
Anatahan continues to steam after its largest eruption in recorded history on April 6, 2005. This major eruption was a continuation of its third historical eruption, which began early in January 2005. Anatahan is located in the Northern Mariana Islands in the North Pacific Ocean and has been responsible for blanketing Guam and other nearby islands with volcanic haze.